Abstract: An improved fastener is utilized to provide a sealed connection between two or more members. The fastener includes a threaded metal shank having a head with a relatively large radially extending collar. An end portion of the shank head extends outwardly from the collar. A outer head or covering of polymeric material is molded around the metal shank head. The outer head of polymeric material engages a recess in the metal shank head to hold the polymeric material against rotation when fastener is tightened by applying torque to the polymeric material. The outer head of polymeric material includes a stiff annular skirt which circumscribes the shank of the fastener. The skirt slopes inwardly toward the shank so that when the fastener is tightened, the skirt is pivoted or folded inwardly between the collar and the member to which the fastener is connected. This enables the skirt to provide a weather tight seal between the fastener and the member.